Senior SDET (TypeScript, Web3)

We are hiring a Senior SDET to ensure the stability, reliability, and security of a blockchain-based product. You will own QA automation before and after launch, build and evolve TypeScript-first test suites, and work closely with developers and DevOps in fast release cycles. Strong TypeScript programming matters more than operating specific tools.

Responsibilities

• Own QA automation from pre-launch through post-launch stabilization.


• Build and maintain TypeScript-first suites with Playwright, Jest, and Node-based tooling.


• Design scalable API, UI, and CLI automation with clear, reliable signals at scale.


• Integrate tests into CI/CD (GitHub Actions, Docker; parallel pipelines) and enforce quality gates.


• Create and manage containerized test environments and test data (Docker, K8s).


• Validate functional correctness and protocol interoperability; support regulatory compliance checks where applicable.


• Author and maintain manual and automated test cases where they add value; keep documentation current.


• Log, triage, track, and re-test defects in the agreed issue tracker.


• Participate in release readiness reviews and sign-off.


• Perform security testing and collaborate with engineers to drive fixes.


• Use advanced Git workflows in day-to-day collaboration.

Requirements

Must-have

• 5+ years of QA experience in blockchain or fintech.


• Strong TypeScript automation expertise (Playwright, Jest, Node-based frameworks).


• Deep understanding of TypeScript fundamentals, SOLID principles, and core data structures.


• Proven API / UI / CLI automation at scale.


• Security testing experience.


• CI/CD integration experience (GitHub Actions, Docker; parallel pipelines).


• Advanced Git proficiency.

Nice-to-have

• Rust familiarity.


• Performance and load testing (k6).


• Smart contract / DApp QA (Hardhat, Foundry, ethers.js, viem).


• Web3 QA on major chains (Ethereum, Bitcoin, Solana, etc.).


• Blockchain node and RPC testing, event verification.


• Containerized test environments (Docker, K8s).


• Experience with privacy-preserving or privacy-focused systems and protocols.


• Experience working in regulated environments or aligning QA with regulatory compliance.

How we work

• Fully remote. EU-friendly hours with short daily syncs; mostly async outside that window.

What we offer

• Competitive contractor compensation.


• International Web3 projects.


• Fully remote work and flexible hours.


• Conference participation and publishing opportunities.


• Mentoring, training, and real career growth.


• Supportive, multicultural team.

What will help you stand out

• Evidence of TypeScript automation you’ve written (links or samples).


• Solid CI examples (parallel pipelines, containerized runners, caching strategy).


• Clear, proactive communication: you seek missing details, clarify undocumented areas, and help improve documentation.